7998190340381 has 2 divisors, whose sum is σ = 7998190340382. Its totient is φ = 7998190340380.

The previous prime is 7998190340363. The next prime is 7998190340431. The reversal of 7998190340381 is 1830430918997.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6750076844281 + 1248113496100 = 2598091^2 + 1117190^2 .

It is a cyclic number.

It is not a de Polignac number, because 7998190340381 - 2¹⁴ = 7998190323997 is a prime.

It is a super-2 number, since 2×7998190340381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7998190340681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3999095170190 + 3999095170191.

It is an arithmetic number, because the mean of its divisors is an integer number (3999095170191).

Almost surely, 2^{7998190340381} is an apocalyptic number.

It is an amenable number.

7998190340381 is a deficient number, since it is larger than the sum of its proper divisors (1).

7998190340381 is an equidigital number, since it uses as much as digits as its factorization.

7998190340381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11757312, while the sum is 62.

The spelling of 7998190340381 in words is "seven trillion, nine hundred ninety-eight billion, one hundred ninety million, three hundred forty thousand, three hundred eighty-one".